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How to Install Maldet and Run a Scan

What is Maldet?

Maldet is a commonly used abbreviation for Linux Malware Detect (LMD), a malware scanner for Linux released under the GNU GPLv2 license.

What makes Maldet unique, is that it is designed around the threats faced in shared hosting environments. Maldet works by using threat data from network edge intrusion detection systems to extract malware that is actively being used in attacks and generates signatures for detection.


How to Install Maldet in 5 Easy Steps

Before you can run a scan with Maldet, you’ll need to download, unpack, and install it onto your server. By following these five easy steps though, you’ll be up and running in no time. Best of all, the process can be completed entirely from within your server’s terminal by using the following series of commands. 

  1. First, you’ll need to login to your server with root user

  2. The Maldet installation pack is not available from online repositories, but is instead distributed as a tarball from the project’s official web site. The tarball containing the source code of the latest version can be downloaded directly using the following command or by accessing this link:


Terminal window showing the results of the "wget" command

  1. Once the tarball is downloaded, you’ll need to unpack it and enter the directory where its contents were extracted. To extract the file, use the command shown below and hit enter.

    tar -xvf maldetect-current.tar.gz

Terminal window showing the files unpacked after using the "tar -xvf maldetect-current.tar.gz" command

  1. Now, move to the Maldet directory using the command:

    Cd maldetect-1.4.2

Terminal window showing the "cd maldetect-1.4.2" command being used to move into the Maldet directory

Terminal window showing the contents of the Maldet directory using the list command

  1. Once you’ve moved into the Maldet directory, you will have to execute the installation script. This can be done by entering the command below and then hitting enter.

    ./install sh

Terminal window highlighting the "./" command as well as the result: "maldet(2890): {sigup} new signature set (201504066258) available"


Running a Scan with Maldet

Now that Maldet is installed, you can check to make sure it’s working correctly by running a scan on your server to identify infected files. To run a scan, enter the following command:

maldet –a

As you can see in the image above, if everything has been entered correctly, you should see that Maldet has started scanning now.


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